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OK, we admit, we're a long way from a carbon-free grid—but when we have one, what's the most efficient way to use that energy to fly planes? This question is explored by an interactive tool built by a ...

Following a decade of innovation and engineering, the company's new 13-liter DC13 engine is its most sustainable engine ...

In its most basic form, the piston in a free piston engine simply oscillates ... The actual combustion process is actually extremely efficient converting almost all of the available chemical ...

Most impressive is the claim that this ... one of the best values worldwide for automobiles with combustion engines. Despite all the efficiency: the Golf TDI BlueMotion, which has a top speed ...

Horse's brief wasn't simply to churn out new electric motors and battery packs for pure-electric vehicles but to create a comprehensive lineup of efficient combustion engines, transmissions and ...